Beacon



FIG. 1 is a perspective view of a beacon embodying my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a right side elevational view of FIG. 2, and the left side elevational view being a mirror image thereof; and,

FIG. 5 is a top plan view of FIG. 1.

The bottom view of the beacon does not form any part of the claimed design. 

I claim the ornamental design for a beacon, as shown and described. 